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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
UV–Vis absorbance spectra of the iodine–starch complex used to quantify the production by the MgO NPs under irradiation UV and dark conditions; (a) 4 h and (b) 24 h.